学 术 报 告:稀土发光材料在辐照安全、石油开采和食品检测上的应用

审核发布:系统管理员 来源单位及审核人: 发布时间:2015-03-18浏览次数:539

学 术 报 告

报告题目:The Exploration of Rare Earths Based Luminescence for Detection and Sensing in Radiation Security, Enhanced Oil Recovery and Food Safety(稀土发光材料在辐照安全、石油开采和食品检测上的应用)

报 告 人:美国德克萨斯大学阿灵顿分校物理系陈伟教授

    间:2015323日上午8:30-10:30

    点:材料与能源学 北楼 231

 

陈伟教授简介

Dr. Wei Chen is a full professor of Nano-Bio Physics at the Physics Department, The University of Texas at Arlington.  He received his Ph. D. in Chemistry from Peking University, Beijing, China. In 2000, Dr. Chen joined Nomadics, where he serves as a senior and leading scientist in Nanotechnology. In 2006, he joined UTA as an assistant professor in Nano-Bio Physics and was promoted to associate professor in 2011 and a full professor in 2013. Dr. Chen pioneered the photostimulated luminescence of nanoparticles and the nanoparticle self-lighting photodynamic therapy for cancer treatment. He has been funded by National Natural Science Foundation of China, President Special Funds of Chinese Academy of Science, NSF, NIH, DHS, DOE, Army Medical and Air Force Office, DTRA and Industry.  He has 7 US patents granted and 7 US patents pending. He has co-authored more than 180 journal publications, 4 invited review articles, 7 book chapters and one edited book. So far, Dr. Chen’s publications have been cited more than 7000 times and his H-index is 36. He serves as Editor-in-Chief for Reviews in Nanoscience and Nanotechnology, American editor for the Journal of Nanoscience and Nanotechnology and the associate editor for Journal of Biomedical Nanotechnology published by American Scientific Publishers.

 

报告内容简介

Dirty bomb or radiation attack is a big threat to the world and the developing of high sensitive technologies for radiation detection is an emerging need. Also, the development of high-performance scintillating materials is essential for precision calorimetry in high energy physics, medical imaging and industries. The most frequently considered characteristics of scintillators are efficiency of energy conversion, stopping power, luminescence decay time, spatial resolution, and physical and chemical stability. Currently applied inorganic crystalline scintillators are not only limited by their high cost and scalability issues, but also limited by other intrinsic drawbacks. For example, high purity germanium must be operated at liquid nitrogen temperature, while sodium iodide crystal is highly hygroscopic. On the other hand, plastic scintillators based on polymeric materials are cheap and easy to manufacture, but have low light yield and low density. In this talk, I will present the strategy for how to design luminescence nanomaterials based on energy transfer for radiation detection.

Oil exploration and production are always the hot area as natural oil is still the major energy for our society. Luminescence materials may play an important role in oil exploration and extraction either as water tracers or as new materials for wettability enhancement. In addition, food quality and safety are related to our daily life. In this talk, I also present some new ideas and methods for the potential applications of luminescence materials for oil recovery and food safety.

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